Zfp is lossy compression just FYI. Fpzip (an earlier invention by Lindstrom et al) has a lossless mode. They really push zfp more though as it has nice features

Zfp is lossy compression just FYI. Fpzip (an earlier invention by Lindstrom et al) has a lossless mode. They really push zfp more though as it has nice features like random access decoding and (except on my data) higher compression ratios.